Single drum locomotive boiler



July 27, 1943. G. H. EMERSON 2,325,383

SINGLE DRUM LOCOMTIVE BOILER Filed Nov. 24, 1941 5 Sheets-Sheet l l v @AN r l \1\ tif" O Q i s 5) i f\ Il Ii ATTR/VFY July' 27, G, H EMERSON n 2,325,383

SINGLE DRUM LOCOMOTIVE BOILER Filed Nov. 24, 1941 5 Sheets-Sheet 2 Emar- E INVENTOR.

July 27, 1943. G. H. EMERSON A SINGLE DRUM LGCOMOTIVE BOILER Filed Nov.Y 24, 1941 5 SheecS-SheefI 3 IN V EN TOR.

July 27, 1943. G. H. EMERSON 2,325,383

SINGLE DRUM LCCOMOTIYE BOILER Filed Nov. 24, 1941 5 Sheets-Sheet 4 13"; nl ummm ....,mlll

MHH

/LQQ INVENTOR.

July 27, 1943. G. H. EMERSON SINGLE DRUM LOCOMOTIVE BOILER 5 Sheets-Sheet 5 INVENTOR.

Filed NOV. 24, 1941 Patented July 27, 1943 AUNITED STATES* ein ENT OFFICE:v`4

srNoLe paUMLoppMoTivE BOILER y George H; Emerson, Baltimore,"Md. I"

d t Applicationrisvember 24, 1941, senaiNe. 421296 (poiles- 94X 4 claims.;

My i present invention is an` improvement on a single drum loco-motive boiler `disclosed in. my Patent No. 1,869,309, dated July'25, 1932.` 1

By reason of the invention disclosed .in that patent I was .enabled to reduce the number of drums employed in the top of the re box to a singledrum, thereby providing a simpler, stronger and more durable type of fire' box` without sacrif boiler extension with splash openings in the sidecing steam `generating and ,water circulating.

eciency. This is due, in that construction, toy

vertical circulating tubes j into relatively small particles, each surrounded by a relatively. large effective heating` surface whereby veryr quickA steaming is obtained, and such violent circulation in turn acts as a safety factor as the partof the drum (equivalent to the crown sheet of an ordinary boiler) in contact with the re, will `always be covered with water even through the water level in the boiler tends to actually fall below the level of the water in the drum, as the water will be forced upward by the violent, circulation.;

Under actual operating-conditions, a boiler constructed as covered 'by my Patent,Nc.'1,869,'309, with improvements as hereafter stated, the water dropped to 28 and inchesl below thebottcm gauge cock and 11 inches belowthe drum, notwithstanding which, the water from the side ciri culating tubes was not only suiicient to keepthe drum from overheating inthe re box, but the water 1l inches below the bottom of the drum was sucient to keep up a circulation, from which l it will be seen that a construction shown in my said patent with improvements -is such that it is almost impossible for a locomotive boiler so constructed to explode. f

In the instance above related, a few of the fire t tubes collapsed, with other minor damage.

The object of my present invention is to pro- Vide an improvement in the boiler shown in my above designated patent. y

One of the objects of my invention isto extend a single drum a materialdistance into ,the boiler. Another object of my inventionis to provide a till;

n ofthe water incident to Another object of my inventionis to provide a drum extension with baies to control the surging of the locomotive. Another object of my invention is to add to the numbereotubes 'extending between the bottom headers land :thetop headers shown in the design oi my Patent No.'.1,869,309; For that purpose, in addition to employing substantially vertical water tubesy connecting the top and bottom headers on the respective sides of the rebox, I also employ other setsof tubes connecting each bottom header' 33; ononeside of the rebox to a top header on the other side of the rebox. Thereby the heating surface is increased, theviolence of the circulation enhanced, and the safety factor improved. i

Another object of my invention is to provide i, meansfor rigidly securing the steam drum eX- tension against vibration. i i

`Stillfanother object is to provide suitable apertures through the drum extension walls, whereby water may be discharged from the drum over the Y. g back flue-sheet and the'adjacent and underlying re tubes in such a manner as to obviate danger-` ous` overheating or collapse -even under Vserious low water conditions.

With these and other objects in view, my inven` tion ,consists of parts and combination of parts herein set forth. I

In the drawings: i i `Figure 1 is a central vertical longitudinal sec- `tionalview through the center portion of a locomotiveboiler constructed in accordance withmy invention. y

FigureZ is a top plan view of the re boX showing the `arrangement of the water tubes and their i co-acting headers.

Figure 3 is a fragmentary elevation of a portion of the locomotive boiler showing more particularly the nre box and adjacent parts;

Figure 4 is a transverse vertical section on an enlarged scale taken on line 4 4 of Figure 1.

Figure 5 is a detail horizontal section taken on line 5 5 of Figure 4.

Figure 6 is a transverse vertical section taken on line 6 6 of Figure 1.

Figure? is a transverse vertical section taken i. .onlinei1 l of Figure 1, the rods I0 and bridge 8 beingomitted from this view.

Figure 8 is a` transverse vertical section taken on line 8 84 of Figure 1.

.Figure 9 is a transverse vertical section taken lonline. 9 9 of Figure 1-.

the stopping and starting and at its rear end through the back head.

The drum is cut on a downward and forward slope providing a major projection 6b of the same extending into the barrel 'Liorward of the rear or back iiue sheet IQa, said drum extension being reduced to a substantially semicircular trough like portion adapted to readily fit in the portion of the barrel 1. This trough like portion or extension of the drum 6 extends substantially into the barrel l. and, therefore, it becomes riet-e essary to anchor or brace it against vibration for which purpose I provide T irons within the trough extension 6b- Which .are secured to the. side walls of the trough by Ineens of rivets er the like 9. Gussets or baille plates Il are secured to. these T irons.. A bridge strengthening member a spans the interior of. the. drum and has its. ends, which ent-:ece and conferm in shape t thentericr Sure faces .of the drum walls, suitably secured thereto by rivets 8c. @ne end ci eachk of a plurality of rods Itis suitably secured to the bridge 8, while the other end. of said rods is. suitably secured to another Fv iron H secured tothe front nue sheet l2... Appropriate plates` I3 are secured to the forward end of the trough extension 6B having ears to which one end of relatively short brace rods It are secured while the other ends of these rods M are securedto T irons Illa securedto. the front flue sheet l2. Additional' brace. rods l are also secured to the frontend of the trough extension and to other-Tirons 16a also secured to thefrontue sheet l2, as shown rin Figures 9 and 10....,

The rods lll, I

The upper edge portions of the. drum extension 6b, are secured to the sheet by means of the angle plates lio, securedto the barrel wall and between pairs of which plates those edge portions extend.

rIhe large bulk of water in the drum and its trough .extension 6b will unless prevented surge violently in the stopping andy starting, and other service movements, of the locomotive. fore, I have provided the trough extension 6b with baffles il secured to the inner face of the walls'of thetrough, as shown, in detail in Fig-ure 7. I attach to the ballles Il at the front 'of the extension Gb, an additional baille `Ila, which partially closes the front end of. the extension 6b and retards theilow oi? water, said baffles Ha,- having slots l'ib. These bales act as retarders to the surging of the water. The side walls of the. trough Eb are provided with. "splash" openings !8, varying in size, throughl which waterv may splash from. the trough 6b onto the tubes I'B to prevent overheating of they tubes when the Waterris getting dangerouslylow in the drum. As a, further precaution Vagainst rexplosion of* the boiler I provide the bottomwall of the trough 6b with. a. plurality of; openings,v orfports, 2! (three only being shown), said openings, preferably, being, about three inches.- ln diameter. These openings 29 are directly over thetubes I9-, These- 4 and retransmit me distribute stresses. between the drum extension and theV frontv flue sheet and check vibrations ofthe drum.

Thereopenings are circulating ports, and are intended to supply water from the drum to the back flue sheet and ends of the tubes in the event of low water.

It has been found that circulation of water from the side circulating tubes 2l was not only sufficient to keep the drum from overheating in the re box end, but with water about eleven inches below the bottom of the drum a sufficient amount oi water was discharged through the openings 2d to keep the nues and the flue sheet from overheating, thereby preventing an explosion. By preventing the overheating of the tubes I have eliminated the possibility of the flue sheet being forced ofi the tubes, and also prevented the majority of the tubes from collapsing.

The improvements disclosed herein when incorporated in the structure otherwise revealed by my Patent No. 1,869,309, will constitute a safety boilerV that will not explode so long as substantial quantities of water continue to reach the drum from the tubes, even though the water falls far below the drum, which takes the pleo-e of the usual crown sheet. n

To increase radiant heating surface of the boiler shown in my above patent, I have added a plurality of third tubes 52, more` clearly shot/'n in Figures i and 5, which third tubes are secured in the Openings E3. formed in the lower and upper headers 2t; 25, respectively, but extending vertically as do the circulating tubes 2i. The body portion of these additional water circulating tubes 22 extend upwardly and transversely of the fire box, the upper end of each tube E2 being open communication with the upper header EEE at one side of the lire box, while its lower end is in open communication with the header at the opposite side of the iile box, as clearly shown in Figure 4;, These additional circulating tubes.' are so positioned relatively to each other and to the tubes 2l that they mayy be readily and coni-fen iently cleaned. Connection nipples 2S connect the upper headers and the drum. The forward ends of the lower headers communicate with the water space ofthe barrel through the Vthroat sheet. g

The splash openings ill and ports E@ insure a larger supply of water between the drum and the sidel shell of the boiler which results in a decided advantage iii-assisting circulation, especially to the back flue sheet, besides preventing the collapse of the tubes, and keeping the ue sheet from overheating.

What l claim is:.

l. ln al-ocomotive boiler, a cylindrical drum ex tending through the upper part of the lirebox and having a tlf-shaped in cross section extension into the barrel of the boiler, the upper margins of the sides of said extension being secured to the boi-ler shell.

2. a locomotive boiler, a drum in the fire bon having a forward extension U shape in cross section and extending a major distance into the shell o f the boiler, a backflue sheet, lire tubes extending forwardly-from the backl flue sheet and positioned under saidextension, ports in the bottom wall of said extension positioned over said tubes, a plate positioned near the rearI of said extension, and a baille platei positioned near the frontV end of said extension, `an additional baille plate secured to the said front baffle plate to further retard the ilow of water'in said' extension.

3.. In a locomotive boiler, a drumfin the tire box having a forward extension U shape-in cross sectionand extending a major ydistance into the shell of the boiler, a back flue sheet, re tubes extending from the back sheet and positioned l under said extension, ports in the bottom Wall of said extension and positioned over said tubes, a baie plate positioned near the rear of said section and extending a major distance into the lshell of the boiler, a back iue sheet, fire tubes extending from said sheet'and positioned under the said extension, ports inthe bottom wall of said' extension positioned over thesaid tubes,

splash Vports in the side walls of said extension,

a baffle plate positioned near the rear of said extension, a. baille plate positioned near the front end of said extension" and ,having a more rrestricted opening than the said rear baiie plate to further retard the flow ofwater at the forward end` of said extension.V` .t

GEORGE H. EMERSOIE. 

